Alert archive / Minnesota / Tornado Warnings in 2011

Tornado Warning 11, NWS Grand Forks, ND

May 30, 2011Grant County, Minnesota

NWS Grand Forks, ND issued this tornado warning at May 30, 2011, 9:12 PM CDT for Grant County, Minnesota. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 30, 2011, 9:12 PM CDT (02:12 UTC)
Expired: May 30, 2011, 10:00 PM CDT
In force: 48 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

County Grant County, MN

The radar

The Aberdeen radar (KABR), 186 km from the middle of the area, began a volume at 02:13 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 30, 3:52 PM CDT	Tornado Watch	SPC	7 hr
May 30, 8:43 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.2 hours before the alert went out and 212 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1125 J/kg
Mixed-layer CIN: -258 J/kg
Mixed-layer LCL: 775 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

144 
WFUS53 KFGF 310212
TORFGF
MNC051-310300-
/O.NEW.KFGF.TO.W.0011.110531T0212Z-110531T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
912 PM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  GRANT COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 1000 PM CDT

* AT 910 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM WAS
  LOCATED 5 MILES SOUTH OF HERMAN...OR 37 MILES SOUTH OF FERGUS
  FALLS...MOVING TO THE NORTHEAST AT 50 MPH.

* THE TORNADIC STORM WILL BE NEAR...
  ELBOW LAKE...WENDELL AND BARRETT AROUND 930 PM CDT.
  ASHBY AROUND 945 PM CDT.

FOR MOTORISTS ON INTERSTATE 94...THE TORNADIC STORM WILL BE
BETWEEN...MILE MARKERS 72 AND 78 AROUND 940 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

&&

LAT...LON 4576 9625 4611 9626 4611 9625 4611 9579
      4577 9589
TIME...MOT...LOC 0212Z 211DEG 42KT 4577 9609

$$
DK

2 follow-up statements

955 
WWUS53 KFGF 310226
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
926 PM CDT MON MAY 30 2011

MNC051-310300-
/O.CON.KFGF.TO.W.0011.000000T0000Z-110531T0300Z/
GRANT MN-
926 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR GRANT COUNTY IN WEST
CENTRAL MINNESOTA UNTIL 1000 PM CDT...

AT 924 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES NORTHEAST
OF HERMAN...OR 30 MILES SOUTH OF FERGUS FALLS...MOVING TO THE
NORTHEAST AT 50 MPH.

THE TORNADIC STORM WILL BE NEAR...
  ELBOW LAKE...WENDELL AND BARRETT AROUND 935 PM CDT.
  ASHBY AROUND 950 PM CDT.

FOR MOTORISTS ON INTERSTATE 94...THE TORNADIC STORM WILL BE
BETWEEN...MILE MARKERS 72 AND 77 AROUND 945 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

&&

LAT...LON 4576 9625 4611 9626 4611 9625 4611 9579
      4577 9589
TIME...MOT...LOC 0226Z 211DEG 42KT 4587 9604

$$
DK

675 
WWUS53 KFGF 310255
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
955 PM CDT MON MAY 30 2011

MNC051-310305-
/O.EXP.KFGF.TO.W.0011.000000T0000Z-110531T0300Z/
GRANT MN-
955 PM CDT MON MAY 30 2011

...THE TORNADO WARNING FOR GRANT COUNTY IN WEST CENTRAL MINNESOTA
WILL EXPIRE AT 1000 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. HEAVY RAINFALL IS STILL POSSIBLE IN GRANT COUNTY THROUGH 
1030 PM.

LAT...LON 4576 9625 4611 9626 4611 9625 4611 9579
      4577 9589
TIME...MOT...LOC 0255Z 211DEG 42KT 4616 9579

$$
DK

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 8:47 PM CDT	Tornado Warning	FGF	Clay	43 min
May 30, 8:58 PM CDT	Tornado Warning	FGF	Polk	47 min
May 30, 9:06 PM CDT	Tornado Warning	FGF	Polk	39 min
May 30, 9:22 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Norman	38 min
May 30, 9:40 PM CDT	Severe Thunderstorm Warning	FGF	Pennington, Polk, Red Lake	65 min
May 30, 9:43 PM CDT	Tornado Warning	FGF	Polk	47 min
May 30, 9:48 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	27 min
May 30, 9:50 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	25 min
May 30, 10:12 PM CDT	Flash Flood Warning	FGF	Grant	9 hr
May 30, 10:20 PM CDT	Areal Flood Advisory	FGF	Polk	8 hr
May 30, 10:21 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Otter Tail and 2 more	54 min
May 30, 10:33 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more	57 min
May 30, 11:16 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	29 min
May 31, 3:44 AM CDT	Wind Advisory	FGF	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 11 more	19 hr

Nearby

Tornado Warnings in Minnesota, 2011 Every tornado warning in 2011 Tornadoes in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.